<template>
  <el-menu
    default-active="1-4-1"
    class="el-menu-vertical-demo"
    @open="handleOpen"
    @close="handleClose"
    :collapse="isCollapse"
    background-color="#545c64"
    text-color="#fff"
    active-text-color="#ffd046"
  >
    <h3 v-show="!isCollapse">通用后台管理系统</h3>
    <h3 v-show="isCollapse">后台</h3>
    <el-menu-item
      :index="item.path"
      v-for="item in noChildren"
      :key="item.path"
      @click="clickMenu(item)"
    >
      <i :class="'el-icon-' + item.icon"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <el-submenu
      :index="item.label"
      v-for="item in haschildren"
      :key="item.path"
    >
      <template slot="title">
        <i :class="'el-icon-' + item.icon"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group>
        <el-menu-item
          :index="subItem.path"
          v-for="(subItem, subIndex) in item.children"
          :key="subIndex"
          @click="clickSubItem(subItem)"
        >
          <i :class="'el-icon-' + subItem.icon"></i>
          <span slot="title">{{ subItem.label }}</span>
        </el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>

<style lang="scss" scoped>
  .el-menu{
    height: 100%;
    // border: 1px solid red;
    border: none;
    h3 {
      color: #ffffff;
      text-align: center;
      line-height: 48px;
    }
  }
  .el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
</style>

<script>
export default {
  data () {
    return {
      menu: [
        {
          path: '/',
          name: 'home',
          label: '首页',
          icon: 's-home',
          url: 'Home/Home'
        },
        {
          path: '/mall',
          name: 'mall',
          label: '商品管理',
          icon: 'video-play',
          url: 'MallManage/MallManage'
        },
        {
          path: '/user',
          name: 'user',
          label: '用户管理',
          icon: 'user',
          url: 'UserManage/UserManage'
        },
        {
          path: '/event',
          name: 'event',
          label: 'Vue中的事件委托',
          icon: 'user',
          url: 'EventDispose/EventDispose'
        },
        {
          label: '其他',
          icon: 'location',
          children: [
            {
              path: '/my',
              name: 'my',
              label: '页面1',
              icon: 'setting',
              url: 'Other/PageOne'
            },
            {
              path: '/page2',
              name: 'page2',
              label: '页面2',
              icon: 'setting',
              url: 'Other/PageTwo'
            }
          ]
        },
        {
          path: '/test',
          name: 'test',
          label: '测试',
          icon: 'user',
          url: 'EventDispose/EventDispose'
        }
      ]
    }
  },
  methods: {
    handleOpen (key, keyPath) {
      console.log(key, keyPath)
    },
    handleClose (key, keyPath) {
      console.log(key, keyPath)
    },
    clickMenu (item) {
      this.$router.push({ name: item.name })
      this.$store.commit('SelectMenu', item)
    },
    clickSubItem(subItem){
      //查看iteam
      //对item下的name获取
      //把name压入router
      this.$router.push({name: subItem.name})
    }
  },
  computed: {
    noChildren () {
      return this.menu.filter((item) => !item.children)
    },
    haschildren () {
      return this.menu.filter((item) => item.children)
    },
    isCollapse () {
      return this.$store.state.tab.isCollapse
    }
  }
}
</script>
